'09 TL SH-AWD Driver's Side Fuse/Relay Box

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Old Jun 30, 2025 | 09:30 AM
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'09 TL SH-AWD Driver's Side Fuse/Relay Box

Anybody have one for sale? I have voltage going in (F11) but not coming out (P9). This is the circuit from Fuse 15 in the under hood fuse box, that supplies (among other things) Pin 16 at the OBDII connector with 12 volts. No voltage from the driver's fuse box to wire harness connector P (pin 9) basically doesn't allow a lot of stuff to work, without getting into too much detail. Car won't recognize the key fob at all so can't power ON the car (keyless access), to begin with. I don't know what to do other than replace the fuse box.

Any thoughts anyone?

Thanks.
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Old Jul 1, 2025 | 05:53 AM
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Originally Posted by willr22
Anybody have one for sale? I have voltage going in (F11) but not coming out (P9). This is the circuit from Fuse 15 in the under hood fuse box, that supplies (among other things) Pin 16 at the OBDII connector with 12 volts. No voltage from the driver's fuse box to wire harness connector P (pin 9) basically doesn't allow a lot of stuff to work, without getting into too much detail. Car won't recognize the key fob at all so can't power ON the car (keyless access), to begin with. I don't know what to do other than replace the fuse box.

Any thoughts anyone?

Thanks.
If it's a pass-through wire through the fuse box, what's stopping you from just trying to throw a jumper wire in there to see what happens?

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Old Jul 1, 2025 | 08:02 AM
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Well, I guess nothing is stopping me other than we already took the box out to inspect it for anything obvious and to change it out. That was fun. And I'll have to look at the diagrams again to see if that makes sense. I'd still be unsure of what else might be happening in the fuse box...it might not be as simple as just passing through. Do you see it as just a wire passing through from F11 to P9? What about the leg to the Driver's MICU on the dwg? Your suggestion seems reasonable, though. Thanks.
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Old Jul 1, 2025 | 09:00 PM
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Originally Posted by willr22
Well, I guess nothing is stopping me other than we already took the box out to inspect it for anything obvious and to change it out. That was fun. And I'll have to look at the diagrams again to see if that makes sense. I'd still be unsure of what else might be happening in the fuse box...it might not be as simple as just passing through. Do you see it as just a wire passing through from F11 to P9? What about the leg to the Driver's MICU on the dwg? Your suggestion seems reasonable, though. Thanks.
That's right, if you do it right, you need to pull the fuse box, completely disassemble it and see what really happened there. Possibly water, corrosion and a rotten track, possibly a burnt track due to a large load and a failed fuse.
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Old Jul 3, 2025 | 01:49 PM
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There's an eBay box due here tomorrow. We plan to plug it in and have everything fire up as designed and get on with it. That's the plan...

Appreciate you jumping in with some good stuff.
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